Method for preparing ion liquid type gel polymer electrolyte and battery by in situ polymerization

A gel polymer, ionic liquid technology, used in secondary batteries, circuits, electrical components, etc., can solve the problem of ionic liquid gel polymer electrolytes and batteries. There are no patent publications and article reports, lithium-ion battery preparation The method is complex, the process requirements are high, and the effect of good application prospect, avoidance of leakage and simple preparation process is achieved.

Active Publication Date: 2009-07-08
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Although ionic liquids have good application prospects as polymer electrolytes, it is still in the initial research stage to obtain ionic liquid polymer electrolytes with high electrical conductivity, excellent thermal stability and mechanical properties (Md.Abu Bin Hasan Susanet al, J.Am.Chem.Soc., 2005, 127, 4976-4983; Jing Jiang et al, React.Funct.Polym., 20

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  • Method for preparing ion liquid type gel polymer electrolyte and battery by in situ polymerization
  • Method for preparing ion liquid type gel polymer electrolyte and battery by in situ polymerization

Examples

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Embodiment 1

[0032] Dissolve 0.1g of polyethylene glycol dimethacrylate in 1.9g of acrylonitrile as component A; dissolve 1.0g of ethylene carbonate in component A as component B; weigh 1.0g of 1- Butyl-3-methylimidazolium tetrafluoroborate and 0.01g of azobisisobutyrocyanide initiator are directly mixed with component B and stirred at 25°C. Polymerized for 72 hours to obtain ionic liquid gel polymer electrolyte. Conductivity at room temperature: 1.69×10 -4 S cm -1 . It is also found that under this proportion, the prepared ionic liquid gel polymer electrolyte has good dimensional stability, and satisfies the requirement of ion conductivity as an electrolyte for lithium-ion batteries.

Embodiment 2

[0034] Dissolve 0.1g of polyethylene glycol dimethacrylate in 1.9g of acrylonitrile as component A; dissolve 1.0g of ethylene carbonate and 0.17g of lithium perchlorate in component A as component B ;;Weigh 1.0g of 1-butyl-3-methylimidazolium tetrafluoroborate and 0.01g of azobisisobutyrocyanide initiator, mix it directly with component B, and stir at 25°C, After stirring evenly, polymerize in situ at 60° C. for 72 hours to obtain an ionic liquid gel polymer electrolyte. Conductivity at room temperature: 9.86×10 -5 S cm -1 . It is also found that under this proportion, the prepared ionic liquid gel polymer electrolyte has good dimensional stability, and satisfies the requirement of ion conductivity as an electrolyte for lithium-ion batteries.

Embodiment 3

[0036] Dissolve 0.1g of polyethylene glycol dimethacrylate in 1.9g of acrylonitrile to form component A; dissolve 1.0g of ethylene carbonate and 0.2128g of lithium perchlorate in component A to become component B; Weigh 1.0g of 1-butyl-3-methylimidazolium tetrafluoroborate and 0.01g of azobisisobutyronitrile initiator, mix it directly with component B, and stir at 25°C, After stirring evenly, polymerize in situ at 60° C. for 72 hours to obtain an ionic liquid gel polymer electrolyte. Conductivity at room temperature: 1.72×10 -4 S cm -1 . It is also found that under this proportion, the prepared ionic liquid gel polymer electrolyte has good dimensional stability, and satisfies the requirement of ion conductivity as an electrolyte for lithium-ion batteries.

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Abstract

The invention relates to a method for preparing ionic liquid type gel polymer electrolyte through home position polymerization. The method comprises the following steps: taking acrylonitrile and polyethylene glycol dimethyl acrylic acid ester as monomers, taking ethylene carbonate as an organic plasticizer, taking azo diisobutyl cyanogen as an initiator, taking lithium perchlorate as a lithium salt, adding ionic liquid 1-butyl-3-methylimidazole tetrafluoborate as the component of the electrolyte, and adopting a free radical initiation and home polymerization mode to prepare the stable ionic liquid type gel polymer electrolyte. The home polymerization mode has a simple and feasible process, and is capable of directly assembling a lithium cell while simultaneously preparing the electrolyte. The prepared ionic liquid type gel polymer electrolyte has higher room temperature conductivity, good dimensional stability and mechanic properties, and can also be applied to dye sensitization solar cells. The prepared ionic liquid type gel polymer electrolyte cell can avoid the leakage and volatilization of the electrolyte and improve the safety of the cell.

Description

technical field [0001] The invention relates to a method for preparing ionic liquid gel polymer electrolyte and battery by in-situ polymerization. Background technique [0002] Recently, ionic liquids have attracted widespread interest as a new type of electrolyte. Ionic liquids are substances that are composed entirely of ions and are liquid at room temperature. Since ionic liquids are only composed of ions, they usually have a high concentration of ions and are non-volatile, low melting point, high ionic conductivity, negligible vapor pressure, good thermal and electrochemical stability Etc. Therefore, the introduction of ionic liquids in the polymer electrolyte can not only broaden the operating temperature range of the battery, but also greatly improve the conductivity of the battery and the safety at high power density, making lithium-ion batteries in high-power batteries for electric vehicles Applications in other fields become possible. [0003] At present, there ...

Claims

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Application Information

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IPC IPC(8): C08F220/26C08F220/44C08L33/14C08L33/20H01M10/38H01M10/40
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 齐力汤正林
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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